All the launched sites get Community Promotion Ads meta posts posted every year by a SE mod.
Previously, I thought that beta sites simply weren't allowed them. However, Anime & Manga is still in beta, and they had community promotions meta posts in 2014 and 2013 (I guess they haven't made one for 2015 yet).
So what happens? Do you just have to ask for one? Can the moderators of that site just create one as they like? Can anyone on that site just create one as they like?